输电线路OPGW接地方式的分析研究

为了减少光纤复合架空地线(OPGW)中的电能损耗,针对目前普遍采用的OPGW逐基接地方式,分析和计算了逐基接地带来的电能损耗;试验说明了这种接地方式会使OPGW遭雷击的概率增大。根据OPGW逐基接地产生的问题,提出了OPGW经导弧间隙的接地方式,分析了导弧间隙应满足的技术要求及对线路运行的影响。研究结果表明,用导弧间隙接地方式代替逐基接地方式可有效解决OPGW的环流损耗和易遭雷击断股问题。

Analysis and Research of Grounding Modes of Optical Fiber Ground Composite Wire

Through theoretical analysis and calculation, the power loss caused by the grounding method of the OPGW (optical fiber composite overhead ground wire), which is directly grounded at every tower, is researched.The experimental research and analysis prove that this grounding method increases the possibility of suffering from lightning stroke and breaking. Aiming at the problems brought by the OPGW directly grounding at every tower, a new grounding method,in which OPGW was grounded through arc-guiding gap, was discussed and presented. And the needs for the arc-guiding gap and its influence on the line operation were investigated and analyzed. The results prove that using arc-guiding gap instead of directly grounding at every tower effectively solves the problems of OPGW circulating current loss and its liability of suffering from lightning stroke and breaking.